/*
 * Copyright (c) 2021, 2025, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package jdk.test.lib.thread;

import java.util.concurrent.ThreadFactory;

/*
    This factory is used to start new threads in tests.
    It supports creation of virtual threads when jtreg test.thread.factory plugin is enabled.
*/

public class TestThreadFactory {

    public enum TestThreadFactoryType {
        NONE, VIRTUAL
    }

    private final static TestThreadFactoryType testThreadFactoryType =
            "Virtual".equals(System.getProperty("test.thread.factory"))
                    ? TestThreadFactoryType.VIRTUAL
                    : TestThreadFactoryType.NONE;

    private final static ThreadFactory threadFactory =
            testThreadFactoryType == TestThreadFactoryType.VIRTUAL
                    ? virtualThreadFactory()
                    : platformThreadFactory();

    public static TestThreadFactoryType testThreadFactoryType() {
        return testThreadFactoryType;
    }

    public static boolean isTestThreadFactorySet() {
        return !testThreadFactoryType.equals(TestThreadFactoryType.NONE);
    }

    public static Thread newThread(Runnable task) {
        return threadFactory.newThread(task);
    }

    public static Thread newThread(Runnable task, String name) {
        Thread t = threadFactory.newThread(task);
        t.setName(name);
        return t;
    }

    private static ThreadFactory platformThreadFactory() {
        return Thread.ofPlatform().factory();
    }

    private static ThreadFactory virtualThreadFactory() {
        return Thread.ofVirtual().factory();
    }
}
